|Brachydactyly type D|
Top view of a child with asymmetric brachydactyly type D thumb.
|Classification and external resources|
"Clubbed thumb" is a misnomer for stub(by) thumb, known clinically as brachydactyly type D, or BDD. BDD is a harmless genetic trait characterized by the last bone of one or both thumbs being short and round with an accompanying short and wide nail bed.
Because of the supposed high incidence of BDD among European royalty in the past, BDD is claimed by some to be a marker of descent from European nobility.
The condition is also sometimes known as potter's thumb.
- Online 'Mendelian Inheritance in Man' (OMIM) Brachydactyly, Type D; BDD. -113200
- Alessandro Castriota-Scanderbeg, Bruno Dallapiccola (2005). Abnormal Skeletal Phenotypes: From Simple Signs to Complex Diagnoses. Springer. p. 962. ISBN 3540679979.
- "National Center for Biotechnology Information". www.ncbi.nlm.nih.gov. Retrieved 2015-09-18.
- "Digital Clubbing: A Sign of Underlying Disease" (PDF). Hospital Physician.
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